Sanding device for vehicles



Feb. 21, 1950 R. HUNZIKER SANDING DEVICE FOR VEHICLES Filed Nov. 5, 1946 I (Fig. 3).

Patented Feb. 21, 1950 Rudolf Hunziker, Neuenegg, Switzerland Application November 5, 1946, Serial No. 707,914 In Switzerland November 7, 1945 16 Claims.

Object ofthe present invention is asanding ..;device on vehicles, characterised by means allowing-a gas pressure to be producedin the sand reservoir for the purpose of sand delivery.-

, The'accompanyin drawing illustrates, by way ,;ofexample, onev embodiment of the invention ,.--mounted on an automobile.

. Fig. 1 is a side view of the rear part of the automobile in connection with the schematically illustrated control circuit of the sanding device,

Fig. 2 shows the one'end of a tubular sand ireservoir, partly in section, 1

Fig. 3 illustrates theother end of this reservoir, partly insection, and

. ,Fig. 4 is a front view of the end shown in Fig.

I 2 with nut and packing removed.

Within the mud guard l of the rear wheel 2 of the automobile 3 a tubular sand reservoir 4 -.is mounted. This reservoir 4 may be a sheet is fixed detachably to the inside of the mud guard iron tube or a hose (rubber or textile hose).

1 by means of straps 5 and has at its lower end lying in front of the rear wheel-2 a plug 1 con- ,nected with the tube ll-by means. of a chain 6 This plug 1 in its closing position (Fig. 3) adheres so firmly by friction to the tube wall that it is not expelled under the influence of the '.weight of the sand lying. above it. Thetube 4 f ismounted in such a position above the. wheel that,,the plug 1 being removed, the total sand quantity contained in the reservoir can run out. At the top end of the tube 4 means are provided allowing .a gas pressure to be produced in the Qtube by which, for sand delivery, the plug 7 is iexpelled. In the example illustrated, these means .jj consist ,of a conductor piece. 8 formed asfla glow element wrapped up in gun cotton 9. This conductor piece 8, together with the strips W, the screws .H and the wires l2, are'inserted in an electric circuit which, in Fig. l, is only diagrammatically illustrated. This circuit, besides the power source [3, has two contacts l4 and I! connected in series. Contact [4, in a nonillustrated manner, is in relation with the circuit of the stop tail light flashing up automatically on braking the autombile and is only closed when the tail light flashes up. The other contact l5 can be controlled by hand on the drivers seat, for instance, by a push button on the steering wheel.

The manner of action of the sanding device is as follows:

Assuming that the driver has already begun to brake, the tail light flashes up and the contact I4 is closed. When the automobile now commences to skid, the driver depresses the push-button on the steering wheel and the contact l5 and therebythe heating circuit for the gun cotton 9 is closed. The latter is inflamed and the air in- -the tube 4 is heated and there- .by expanded so that it expelsthe plug 'Lthe .sand running-now outin front-of the wheel 2. All these steps take place in a moment so that the antiskid eiiect occurs at .once.

v The tube 4 being empty it can easily be removed from the mud guard. l andbe refilled with sand.

There may be a tube 4'above each wheel of the vehicle. For producing, gas pressure a means other than gun cotton can :beused, e. g. a means which does not onlyheat the air but, on combustion, produces a gas with a moderate explosion effect.

By the sanding device illustrated the weight of the vehicle is increased but very slightly.

The tube being hidden under the mud guard it Ldoesnot .injure the outer appearance of the vehicle.

There might .be provided several sand tubes for each: wheel, preferably lying side byside.

.mobiles with twin tires.

This. would be especially well suited for auto- Th ignition controlfor the gun cotton orsimilarmeans'might then '..also be designed in such a way that not all the tubes of one wheel are emptied at the same time.

a The sanding device may also be used in motor cycles, bicycles, or in vehicles for rails.

What-I claim is:..

" i 1.. A sanding device. fora wheeled vehicle, ineluding a closed sand reservoir adapted to hold .sanfd andto be attached to a portion of the vehicle in front of a...wheel thereof and having a downwardly extending-g portion forming at its lower end a sand delivery. port through which sandcanbedirected to the wheel; a removable closure iorsaid sand delivery port expellable by rise of pressure withinsaid closed sand reservoir;

vehicle in'front of a wheel thereof and having able" closure. plug Jsaid sand reservoir neer: "li'lcwf-oufithrodgh said sanddliveryz pcrt.

a downwardly extending portion forming at its lower end a sand delivery port through which sand can be directed to the wheel; a removable closure for said sand delivery port expellable by rise of pressure within said closed sand reservoir; an inflammable means wholly contained within said sand reservoir and effective upon ignition thereof to. generate a closure expelling pressure withinsaid' sand'reservoir; and igniting means operable at will for igniting the inflammable means effective to cause said inflammable means to generate within said sand reservoir the pressure necessary for expelling said i'emovable closure, whereby sand contained in said sand reservoir is free to flow out"th'rough' 'saidsand" delivery port.

3. A sanding deviceffor'a wheeled vehicle, including a tube having aclosed uppen end' and forming a sand reservoir-adapted to hold-"sand and to be attached to a. portion of the vehicle in front 'of a wheelthereocandhaving a'down- "wardly extending portion forming at -its lower end; a sand delivery? port 'througwtvhich "sand can he directedto' the wheel a "removableclosure plug for the" sand delivery po'rtexpellable *bya rise of pressure within the closed sandreservcir; means preventing loss of-the' closure'plug when r expelled from said sand delivery" port pressure generating means whollycontained "within said sand reservoir for generating a olosure'expelling pressure within saidf'sandreservoir and means operable at will'for'activating s'aid'pressure' gencrating "means efi'eotive to "cause the 'latter"to generate within said sandreservbir thepressure necessary for expelling said removable closure plug, whereby sand contained in said sandreservoir is free to flow out through said sand delivery ""pdrt.

and to be attached to a portion of thevehElcle in'i'ront or aiwheel thereof andhaving afdownwardly extending portion-forming"atits' lower end a sand delivery port-through whi'ch sand? can be directed to the wheel a removable closure plug-for the sand delivery port" expellable by a rise of pressure within *the closed sandreservoir; an"inflammab1e meanswvliolly contained within said sandreservoir; and" effective 'upon' lgnitiod thereof to generate acloshrdeirhlling' pressure within said sand reservoiryiandignitmgz'means operable at" willi ff'or ignitingithe;inflammable "means and" 'generate within" isaidl'sand reservoir rykteiicexpelnng' "said remov hereby and -containedirin 5: A sanding devlcefor awhelecl wehicle havclosed upper endand' "forming ai'sand reservoir f -eluding atube having aclosdf upper'lend-"and forming a sand reservoiradapted-to hold sand adapted to hold sand and to be attached to a. portion of the vehicle in front of a wheel thereof and having a downwardly extending portion forming at its lower end a sand delivery port 5 through which sand can be directed to the wheel; a removable closure plug for the sand delivery port expellable bya rise of pressure within the closed sand reservoir; meansv preventing loss of the 'closurefplug when: expelled from. said sand 10"dlivery'portg. an inflammable means wholly contained within said sand reservoir and. efiectlve piupon ignition thereof to generate a closure exi' pellingf pressure within said sand reservoir; and igniting'means operable at will including elec- 1 ttrical'contror means accessible from the driver's seat on said'vehicle and extending to said inflanmiabler'means; said electrical control means being efiective upon operation thereof to ignite saidiinflammable means and cause the latter to .20 generate within said sand reservoir the pressure necessary for 'explling saidi removable closure plug;whereby sandcontained in 'said sand reser- -'-voir "is' free-t6 flow out through -said-sand delivery port.

6.:"-A sanding 'device fora" wheeled vehiclehav- 'inga"drivers s'eat and a-stoptail light firicliiding a tube having ablosd upper'end and'forming': a sand-reservoir adapted-to hold sand and "tO" 'bB"' attached to a portion' of *the-vehicleFin 30 front of a wheel the'reofand having a downwardly extediiin-gportiori forming at its lc'rwer end a sand delivery port throughfivhich '"sand can bedi- "rested 'to thewheel a-' removable closure plug for the sand delivery port-"expellableby* a rise do bt pressure -within* theclosed sand reservoir; means preventing loss of" the closure plug'when expl'led from said sand"delivery"'-port;="an inflammable-- means wholly contained within said 'sand-reservoir'and effective upon ignitiorithereof 40%0- generate r a closure" expelling pressure" within said sand reservoiri "igniting" means operable at fwilhincluding electrical controhmeans' accessible at the drivers' seat on: said vehicle 'an' electriccircuit conne'cted'to' the inflammablemeans and having two-switches connected in series;'with 'one switch forming the electrical control'means andefie'ctiveupon 'oper'ation'to' "close said circuit and cause said inflammable means tobefignited x and thereby cause the latterto generate"within said-sand reservoir "the" pressure: necessary? for f expelling said removable" "closure." plug; whereby sand-"contained "in said sand "reservoir :is free to flow" out fthroughi. .sa'idisaiid'."v delivery port,i';vthe stop1tai1 r light beingconnected: .120". :saidflel'ectric circuit and "effective! to t-icl'osei'zther other? switch iand ltherebyalternativelyziclose "said circuit and :jii te said inflamniable."means' whemsaidi'Istop taili light-Lids illuminated. I I'RUDOLFHUNZIICER.

i No references "cited. 

